Aeronautics and astronautics – Spacecraft – Attitude control
Reexamination Certificate
2005-07-26
2005-07-26
Dinh, Tien (Department: 3644)
Aeronautics and astronautics
Spacecraft
Attitude control
C244S164000
Reexamination Certificate
active
06921050
ABSTRACT:
Controlling the solar torque imposed on a spacecraft (10) in flight by providing a film (52) with variable absorptive, reflective, emissive and/or transmissive properties on the sun side of a thermal shield (50) of the spacecraft (10). As the orientation of the thermal shield (50) changes relative to the sun line, the absorptive, reflective, emissive and/or transmissive properties of the shield (50) change to cause the shield's (50) center of solar pressure to change, thus aligning it with the spacecraft (10) center of mass (24) as viewed from the direction of the sun line. In accordance with another embodiment of the invention, the spacecraft (100) is provided with a plurality of control vanes (110-116) that have a variable absorptive, transmissive, reflective and emissive property to maintain the spacecraft (100) stably pointed towards the sun.
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Harris Christian M.
O'Rell Michael K.
Wehner James W.
Dinh Tien
Miller John A.
Northrop Grumman Corporation
Warn, Hoffmann, Miller & LaLone, P.C.
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